This week NASA’s Mars Opportunity rover celebrated its 12 year anniversary on the red planet. What’s truly remarkable about this is the fact that the rover was only designed to operate for about 90 days.

Due to helpful unforeseen surface conditions and few creative software changes, NASA has been able to keep Opportunity alive and operational to this day.

After a six-and-a-half month journey from Earth, Opportunity entered the Martian atmosphere and used a parachute, retrorockets, and a cocoon of airbags to land safely on the surface back in January of 2004.

NASA Rover Designed To Last 90 Days Celebrates 12 Year Anniversary